Method of recovery of sugar from bagasse.



No. 828,198. PATENTED AUG. 7, 1906. 0. 0, OROMWBLL 645E. T. MAXWELLMETHOD OF RECOVERY OF SUGAR FROM BAGASSE.

APPL-IOATIPN FILED. OCT. 10' 1904.

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CLARENCE CLEMM CROMWELL, or NEW ORLEANS, AND FRENCH rHosN- HILL MAXWELL;or BATON aouoa; LOUISIANA.

METHOD OF RECOVERY OF SUGAR FROM BAGASSE.

as. seams.

Specification of Letters Patent.

Patented Aug. '7, 1906.

Application filed October 10,1904. Serial No. 227,966

v To all whom it may concern:

Bait known that wefimnnnon CL MM CBQMWELL, residing at New Orleans, inthe pprish of Orleans, and FRENcIrTnonNmLL AXWELL, residing at BatonRouge, in the parish of East Baton Rouge, State of Louisiana, citizensof the United. States,rhave in yented certain new and usefulImprovements in Methods for the Recovery of Sugar from By or WasteProducts; and we do hereby declare the followi to be a full, clear, andexact description 0 the invention, such as will enable others skilled inthe art to which it appertains to make and use the same.

Our inventionrelates to an improved procass of recovering sugar frombagasse of sugar factories.

It is pro osed to recover the sugar contained in t e-filter-press cakeby means of washing the cake 'with hot water, as is now being done inmany places, and to utilize this wash-water containin sugar for thesaturation or maceration oft e bagasse at the'mills.

The accompanying drawing is a converv tlonal showing of the apparatusused in carryin out our invention.

11 carrym out our invention we roceed as follows: T e slops or scumsfrom t c defecators, clarifiers, or settling-tanks are run into thescum-settlers A A A, provided with draw-off cocks M M M andsightfilasses G, as shown, The scums or slops are ere diluted with hotor cold water. with either chemical reagents or an other reagent thanthat named being adds and the same steamed by means of perforatedsteam-coils S and allowed to settle. As the mass settles the clear juiceis drawn off by way of the cooks before described and is sent directlyto the charging-tank C of the evaporating apparatus for concentrationinto syrup. The mud and unsettled juice is then run into thereceiving-tank B or B, where it is again diluted with water and lime orother chemical agents added thereto and further steamed. After beingthus treated said is run into the tank or mixer D and subjected to themixing and disintegrating action of a dasher V-, which has ave-rtically-reciprocating motion transmitted thereto from the shaft K bysuitable intermediary means. Here the mass is again steamed thoroughly,further diluted, if necessary, and finally separated or under pressurepreferab y from the boilerfe'ed-tank is forced through the cake untilthe latter .is thoroughly freed from en ar, the first filtrate fromscums running into t e tank R and the filtrate from the washed cakerunning into the tank R".

These filtrates are separately maintained where the factory has a millof three sets of rollers; but said filtrates may be mixed in case thefactory has a mill of two sets of rollers.

Where a facto rollers, the 'first the tank R and be delivered or forcedby pump .1 byway of the connection U to and for the saturation ormaceration of the bagasse coming from the first set of rollers Y.

has a mill of three sets of The weak filtrate or washings from R" arepumped through I and connection U and are applied in the same manner aspreviously trate may be taken from described to the ba asse coming fromthe second set of rollers Where a factory has a mill of two sets ofrollers only, the filtrates before mentioned are run into a common tankand ap lied in the same manner as before describe ba 'asse coming fromthe first set of rollers Y.

Where a factory has a mill of three sets of rollers and the twofiltrates from the presses are not found to be sufficient for thepurpose of maceration, the combined filtrates may be applied to thebagasse leaving the first set of rollers and ordinary water may beapplied to the bagasse leaving the second set of rollers. In case afactory has a mill of two. sets of rollers and the two filtrates shouldbe in sufficient for saturation purposes the desired quantity of watermay be added to the combined filtrates in the receiving-tanks beforeapplying the same to the bagass'e leav-' 1n the first set'of rollers.

ow by using the water and sugar solution obtained from the washing ofthe press-cake,

we cut down the total amount of water necessary to be evaporated in theboillng up of to the the eerie-juice and obtain as am extra yieldpractically all the sugar at present heinglest in the press-cake.

Having thus described our invention, what vve claim as new, and desireto secure by Letters Patent, is-

The recess of recovering sugar from beesse 0 sugar factories, wluehconsists in diuting the seums from the settlin -tanks with water,treating with calcium hyrirete, steemuratingthe crushed cane orba-ga-sse with the Wash-waiter containing the sugar extracted from. saidfilter-cake, expressing the uice from the baga-sse and evaporating theresultin}? solution. I

n testimony whereof We affix our signatures in presence of witnesses.

CLARENCE CLEMM CROMWELL. FRENCH THORNHILL MAXWELL. Witnesses toCremwells signature: I ANTHONY BOWAUD, GEO. W. FOSTER. Witnesses toMnxwells signature:

H. V. BENEFIELD. A. E; HAzELRme.

